531320601 has 32 divisors (see below), whose sum is σ = 873462528. Its totient is φ = 280350720.

The previous prime is 531320597. The next prime is 531320611. The reversal of 531320601 is 106023135.

It is not a de Polignac number, because 531320601 - 2² = 531320597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (531320611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4881 + ... + 32961.

It is an arithmetic number, because the mean of its divisors is an integer number (27295704).

Almost surely, 2^531320601 is an apocalyptic number.

531320601 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

531320601 is a deficient number, since it is larger than the sum of its proper divisors (342141927).

531320601 is a wasteful number, since it uses less digits than its factorization.

531320601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28161.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 531320601 is about 23050.3926430766. The cubic root of 531320601 is about 809.9388263510.

Adding to 531320601 its reverse (106023135), we get a palindrome (637343736).

The spelling of 531320601 in words is "five hundred thirty-one million, three hundred twenty thousand, six hundred one".